Expedition Sock is a quick-drying, cushioning mountain expedition sock with extra-fine merino wool and Resistex® performance yarns. Its insulating, absorbent and moisture-wicking French Terry knit fabric has a high percentage of soft merino wool. The Resistex® Bioceramic provides high thermal insulation that maintains a constant body temperature even in extremely cold conditions. In addition, its polyester fibres linked to bio-ceramic crystals regulate temperature by reflecting body heat in the form of FIR (Far InfraRed) rays. The Resistex® Copper yarns offer additional thermal conduction and antibacterial properties.